Reinstate build encyclopedia into the sidebar nav, with light rearranging of some links.

RELNOTES:
PiperOrigin-RevId: 311444021
diff --git a/site/_layouts/documentation.html b/site/_layouts/documentation.html
index dc93480..40e0623 100644
--- a/site/_layouts/documentation.html
+++ b/site/_layouts/documentation.html
@@ -285,9 +285,10 @@
            <h3>Reference</h3>
            <ul class="sidebar-nav">
              <li><a href="/versions/{{ current_version }}/user-manual.html">Commands and options</a></li>
-
-             <!-- TODO(jingwen): version this when the page is in a versioned docset. -->
-             <li><a href="/versions/master/glossary.html">Glossary</a></li>
+             <li><a href="/versions/{{ current_version }}/glossary.html">Glossary</a></li>
+             <li><a href="/versions/{{ current_version }}/be/overview.html">Build encyclopedia</a></li>
+             <li><a href="/versions/{{ current_version }}/test-encyclopedia.html">Test encyclopedia</a></li>
+             <li><a href="/versions/{{ current_version }}/command-line-reference.html">Command line reference</a></li>
 
              <li>
                 <a class="sidebar-nav-heading" data-toggle="collapse"
@@ -303,8 +304,6 @@
                 </ul>
              </li>
 
-             <li><a href="/versions/{{ current_version }}/command-line-reference.html">Command line reference</a></li>
-             <li><a href="/versions/{{ current_version }}/test-encyclopedia.html">Writing tests</a></li>
              <li><a href="/versions/{{ current_version }}/build-event-protocol.html">Build Event Protocol</a></li>
              <li><a href="/versions/{{ current_version }}/output_directories.html">Output directory layout</a></li>
              <li><a href="/versions/{{ current_version }}/platforms.html">Platforms</a></li>
diff --git a/site/docs/test-encyclopedia.html b/site/docs/test-encyclopedia.html
index c646b06..26033af 100644
--- a/site/docs/test-encyclopedia.html
+++ b/site/docs/test-encyclopedia.html
@@ -2,7 +2,7 @@
 layout: documentation
 title: Test encyclopedia
 ---
-<h1>Writing tests</h1>
+<h1>Test encyclopedia</h1>
 
 <p class="lead">An Exhaustive Specification of the Test Execution Environment</p>